International Journal of Advanced Research in Computer Science and Software Engineering (IJARCSSE)
The data backups are outsourced to third party cloud storage services so as to reduce data management costs. The security must be provided for the data that is kept on the cloud. The authors propose an access control model that extends FADE system to take time, email and encryption account, and use term rewriting systems to specify access control policies in this model. The declarative nature of the model facilitates the analysis of policies and the evaluation of access requests.